Battery pack



FIG. 1 is a front view of a battery pack showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines showing the remainder of the battery pack are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

The ornamental design for a battery pack, as shown and described. 